hpandeycodeit commented on issue #6047:  Minor change in the "Start up Druid 
services" Section
URL: https://github.com/apache/incubator-druid/pull/6047#issuecomment-410098043
 
 
   @jihoonson, 
   
   I am getting "Not Enough direct memory" error: 
   
   ```
    1) Not enough direct memory.  Please adjust -XX:MaxDirectMemorySize, 
druid.processing.buffer.sizeBytes, druid.processing.numThreads, or 
druid.processing.numMergeBuffers: maxDirectMemory[4,294,967,296], 
memoryNeeded[5,368,709,120] =
    druid.processing.buffer.sizeBytes[536,870,912] * 
(druid.processing.numMergeBuffers[2] + druid.processing.numThreads[7] + 1)
     at 
io.druid.guice.DruidProcessingModule.getIntermediateResultsPool(DruidProcessingModule.java:110)
 (via modules: com.google.inject.util.Modules$OverrideModule -> 
com.google.inject.util.Modules$OverrideModule -> io.druid.guice.Dru
   idProcessingModule)
     at 
io.druid.guice.DruidProcessingModule.getIntermediateResultsPool(DruidProcessingModule.java:110)
 (via modules: com.google.inject.util.Modules$OverrideModule -> 
com.google.inject.util.Modules$OverrideModule -> io.druid.guice.Dru
   idProcessingModule)
     while locating io.druid.collections.NonBlockingPool<java.nio.ByteBuffer> 
annotated with @io.druid.guice.annotations.Global()
       for the 2nd parameter of 
io.druid.query.groupby.GroupByQueryEngine.<init>(GroupByQueryEngine.java:81)
     at 
io.druid.guice.QueryRunnerFactoryModule.configure(QueryRunnerFactoryModule.java:88)
 (via modules: com.google.inject.util.Modules$OverrideModule -> 
com.google.inject.util.Modules$OverrideModule -> io.druid.guice.QueryRunnerFact
   oryModule)
     while locating io.druid.query.groupby.GroupByQueryEngine
       for the 2nd parameter of 
io.druid.query.groupby.strategy.GroupByStrategyV1.<init>(GroupByStrategyV1.java:77)
     while locating io.druid.query.groupby.strategy.GroupByStrategyV1
       for the 2nd parameter of 
io.druid.query.groupby.strategy.GroupByStrategySelector.<init>(GroupByStrategySelector.java:43)
     while locating io.druid.query.groupby.strategy.GroupByStrategySelector
       for the 1st parameter of 
io.druid.query.groupby.GroupByQueryQueryToolChest.<init>(GroupByQueryQueryToolChest.java:104)
     at 
io.druid.guice.QueryToolChestModule.configure(QueryToolChestModule.java:101) 
(via modules: com.google.inject.util.Modules$OverrideModule -> 
com.google.inject.util.Modules$OverrideModule -> 
io.druid.guice.QueryRunnerFactoryModu
   le)
    ```

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